He was executed in Agro Calventiano, (Calvenzano,
between Marignano and Pavia,) Anonym. Vales. p. 723, by order of
Eusebius, count of Ticinum or Pavia. This place of confinement
is styled the baptistery, an edifice and name peculiar to
cathedrals. It is claimed by the perpetual tradition of the
church of Pavia. The tower of Boethius subsisted till the year
1584, and the draught is yet preserved, (Tiraboschi, tom. iii. p.
47, 48.)